Add chimo's Nodeinfo plugin as a default GNU social plugin

plugins/Nodeinfo/NodeinfoPlugin.php

@@ -0,0 +1,39 @@
+<?php
+
+if (!defined('GNUSOCIAL')) {
+    exit(1);
+}
+
+class NodeinfoPlugin extends Plugin
+{
+    const VERSION = '0.0.1';
+
+    public function onRouterInitialized($m)
+    {
+        $m->connect(
+            '.well-known/nodeinfo',
+            array(
+                'action' => 'nodeinfojrd'
+            )
+        );
+
+        $m->connect(
+            'main/nodeinfo/2.0',
+            array(
+                'action' => 'nodeinfo_2_0'
+            )
+        );
+
+        return true;
+    }
+
+    public function onPluginVersion(array &$versions)
+    {
+        $versions[] = array('name' => 'Nodeinfo',
+            'version' => self::VERSION,
+            'author' => 'chimo',
+            'homepage' => 'https://github.com/chimo/gs-nodeinfo',
+            'description' => _m('Plugin that presents basic instance information using the NodeInfo standard.'));
+        return true;
+    }
+}